When you look at the details a bit more closely, however, what you start to notice is that what these bodies actually show is the accumulation of historical antecedents that have gradually evolved over eons of time, and that no intelligent designer would design such systems... unless he were inept.
As you'll see in the following example of the giraffe's recurrent laryngeal nerve (which can be traced back to our fishy ancestors), and as Richard Dawkins explains in this clip from the Inside Nature's Giants documentary series, evolution is not so much a designer (who can always go back to the drawing board and start from scratch) as a tinkerer (who only gets to slightly modify what's already there).
But of course, even the giraffe would not have had the longest recurrent laryngeal nerve...
That would be what, 30 feet to connect two spots that are only inches apart?